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examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
It affects the growth of trees. It has been increasing since the Ice Age. It is determined by the chemicals in the air. It follows a certain cycle.
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examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
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